True or False Exposure of bacterial cells to antibiotics: 50s is disrupted 60s is disrupted 80s is normal sturdy cell wall
Q: Cell wall inhibitors – (including Penicillins) - Inhibitors of protein synthesis Injury to plasma…
A:
Q: A bacterium that can form endospores likely has the ability to; withstand high temperatures resist…
A: Bacteria is a prokaryotic cell with few micrometer in length and can exist in various shapes and…
Q: You have a mixed culture of 2 different bacterial species. One of the species is Gram negative…
A: Answer: Gram negative bacilli are those rod shaped bacteria which have thin peptidoglycan layer…
Q: If a bacterium can ferment one type of sugar, it can ferment any sugar. If a bacterium can ferment…
A: Most bacteria metabolise sugar as a primary source of their energyobtained in the form of ATP.…
Q: the shape of the bacterial cells for each of the two yogurt bacteria. Be sure to use the terms for…
A: Both streptococcus thermophilus and lactobacillus acidophilus are probiotic Bacteria that are found…
Q: The number of bacteria in a culture every 2 hours and 30 minutes. If the initial number of Bacteria…
A: In the question, we are given: Generation time of bacteria: 2 hours and 30 min. Initial number of…
Q: Which one of the terms below is NOT a stage in the typical growth curve of a bacterial cell under…
A: A typical growth curve of a bacterial cell under ideal condition in culture generally has four…
Q: The goal of Disc diffusion test is Select one: to determine the suitable concentration of an…
A: Antibiotics, such as penicillins and cephalosporins, are a form of antimicrobial drugs that fight…
Q: Which of the following is present in certain Gram positive bacteria and functions in resistance? O…
A: Ans- b) Spores The most resistant part that is present in gram-positive bacteria is spores as it is…
Q: Match the description to the correct phase in a standard bacterial growth curve. best time to…
A: The proliferation of bacteria into daughter cells is referred to as bacterial growth. The growth of…
Q: The following are critical factors for bacteria to survive EXCEPT? A. Appropriate temperature B.…
A: Bacteria can survive in temperatures that are hotter and colder than mammals, but they thrive in a…
Q: The number of bacteria in a culture increases rapidly. The table below gives the number N (t) of…
A: Given Values: Number of bacteria at a time (t=0) = 1000 Number of bacteria at a time (t=3.1 hours) =…
Q: The anaerobic Clostridium species are troublesome pathogens largely because of their capacity for…
A: Clostridium and Bacillus are endospore forming bacteria.
Q: How would a limited food supply affect the bacterial growth curve? The lag phase would be longer…
A: Bacterial growth curve is the number of living cells plotted against time. It has four phases, these…
Q: In the period of bacterial growth,the phase where cells grow rapidly by binary fission is ? a)lag…
A: According to the question, we have to identify the period of bacterial growth, in a phase where…
Q: A microbe cannot grow without using enzymes. Explain why bacteria are limited to growth within a…
A: Introduction Bacteria are the smallest microscopic unicellular organisms on the earth. Bacteria can…
Q: Different types of bacteria are found inbiofilm. Bacteria with oxygen respiration are found at the…
A: A biofilm is the syntrophic consortium of microorganisms in which the cells stick to each other and…
Q: Which of these is a correct match? (Select all that apply) O growth medium: an artificial liquid or…
A: Introduction: A growth medium or culture medium or nutrient broth is a solution which is freed of…
Q: what is plaque essay? what is the purpose of this lab? why this lab is perform? (bacteriophage) what…
A: In plaque essay, the bacterial cells are added into the medium during log-phase. Due to this, a…
Q: Consider the given bacterial growth curve (X axis is time, Y axis is log number of viable cells). At…
A: The number of live cells in a bacterial population over time is represented by the bacterial growth…
Q: Penicillin uses which mechanism of antibiotic action against bacterial cells?
A: Penicillin is a narrow-spectrum antibiotic which kills bacteria by binding the beta - lactam…
Q: Most bacteria require a water activity of 0.9 or higher to grow. A prolonged period of being dry…
A: The amount of 'accessible' water in a food is measured by its water activity, which is typically…
Q: If the temperature of the incubator were to be increased from 35 to 45°C, how would this affect the…
A: The growth of bacteria is influenced by many physical factors. Temperature is one of the significant…
Q: A 23 year old woman has 10 E coli in her bladder. The organism has generation time of 20 minutes.…
A: Escherichia coli doubles itself asexually by the process known as binary fission. To predict the…
Q: Citing the data from your results table tell which antibiotic is the most effective against this…
A: Antibiotic Sensitivity Test is a test used to evaluate to efficacy of particular antibiotic in…
Q: Which of the following is the best definition of the word extremophile? O bacteria that can…
A: Extremophile are those organisms that lives in extremr environmental cinditions like extreme…
Q: Shown below is the growth of E. coli in nutrient agar plates after exposure to different doses of UV…
A: E.coli or Escherichia coli, is a rod shaped, coliform, gram negative bacteria which is facultative…
Q: What cellular structure protects bacteria from drying out? Peptidoglycan Glycocalyx Fimbriae…
A: Bacteria are single celled microorganisms, Which can't alive in a dry surface with a humidity or…
Q: A number of different types of bacteria were grown at different temperature ranges. Which population…
A: Bacteria are unicellular prokaryotic microorganisms (nucleus is not enclosed in a nuclear membrane)…
Q: Which of the following is not true or related to bacterial capsule formation A. Rigid and attached…
A: Bacteria are unicellular prokaryotic microorganisms (nucleus is not enclosed in a nuclear membrane)…
Q: The graph represents the growth rates of different types of bacteria labeled W-z at different…
A: Answer: CARDINAL TEMPERATURE : Every microorganism grows at a certain temperature below which…
Q: Shown below is the growth of E. coli in nutrient agar plates after exposure to different doses of UV…
A: Bacterial growth Growth is defined as an increase in cell number/ amount on the culture plate. To…
Q: Two flasks of E. coli are grown in batch culture in the same medium (2% glucose and amino acids; no…
A: The microorganism can be grown in-vitro. They can grow in semi-solid, liquid, or solid substances.…
Q: Which of the following does NOT describe a mechanism of antibiotic resistance among bacteria?…
A: Bacteria is a prokaryotic organisms which causes different types of diseases in humans and other…
Q: Define the following terms:a. proenzymeb. positive cooperativityc. negative cooperativityd.…
A: Enzymes are biocatalysts that increase the rate of a reaction without actually getting used up in…
Q: Match the description to the correct phase in a standard bacterial growth curv best time to perform…
A: The method of multiplying bacteria in a predetermined medium under controlled conditions in a…
Q: 29. Identify a FALSE statement from the following, Group of answer choices bacterial growth is…
A: The growth of most of the microbes on a culture media is dependent upon the nutrient composition of…
Q: If one of your unknown bacteria ferments lactose, you CANNOT assume that the other unknown will also…
A: Bacterial species are defined as a genomically coherent group of organisms. They are identified…
Q: Antibiotic medication work by targeting specific structures and function in bacterial cells. Side…
A: Antibiotics are medicines or drugs used to prevent and treat bacterial infections. Antibiotic…
Q: Suppose you performed a Gram stain from a pure culture of bacteria and observed a field of red and…
A: Gram stain is a common method useful to differentiate two large groups of bacteria based on their…
Q: The most selectively toxic antibacterial agents are those that interfere with bacterial cell wall…
A: The term "antibacterial" refers to the agents that have the potential to either kill or restrict…
Q: Bacteria of the genus Listeria, grows best aerobically, but can survive when there is no or very…
A: Respiration process is required by organisms to produce energy in the form of ATP. This energy is…
Q: 1. Table 1 lists a typical recipe for growing bacteria in the lab. A researcher discovered a…
A: Microbiological media or bacterial culture media, is a growth medium used to grow bacteria. In other…
Q: When microbiologists are working with bacterial batch cultures, we would expect to see no net change…
A: The most frequent laboratory growth method for studying bacterial growth is batch culture, however,…
Q: In a new batch of culture medium, a group of sub-lethally wounded bacterial cells were transferred.…
A: Lag Phase- In this phase bacteria are still adapting themselves to the culture and are maturing with…
Q: Bacteria can increase in their number by binary fission into two daughter cells. The rate of…
A: The bacterial growth curve is divided into the four-phase the lag phase, the log phase or…
Q: Bacteria growth and multiplication play a role in infectious diseases : Bacteria can increase in…
A: According to the question given above, we have to find out the growth curve effect on the generation…
True or False
Exposure of bacterial cells to antibiotics:
Step by step
Solved in 2 steps
- Which of the following does NOT describe a mechanism of antibiotic resistance among bacteria? enzymes to hydrolyze or chemically alter the antibiotics mutations in target molecules so that antibiotics can no longer bind efflux pumps cell wall diffusion barrier, e.g. Gram-negative outer membrane, Acid Fast cell wall of Mycobacterium O increased synthesis of porins to increase antibiotic diffusion across membranesBacterial capsule helps in adherence of bacteria to surface in its environment. It also protects the bacteria from cell death * BOTH statements are TRUE BOTH statements are FALSE FIRST statement is TRUE ; SECOND statement is FALSE FIRST statement is FALSE; SECOND statement is TRUEList all the antibiotics in the above table that work through destroying the bacterial cell wall. (if there are none listed please state that)
- Match the description to the correct phase in a standard bacterial growth curve. best time to perform Gram stains [ Choose ] [Choose ] phase in which one would see the highest concentration of endopores lag phase stationary phase phase in which bacteria are most sensitive to log/exponential stage antibiotics death/decline phase many bacteria ih biofilms are in this phase, [Choose] thus are more resistant to antibiotics stage at which "carrying capacity" is reached [Choose ]Understand the common bacterial targets for bacterial infections and why they make good targets: Cell wall inhibitors – (including Penicillins) - Inhibitors of protein synthesis Injury to plasma membrane Nucleic acid synthesis inhibitors Inhibit metabolite synthesisIdentify the FALSE statement from the following, if any Group of answer choices capsule plays role in transport process capsule can retain water ; cells protected against drying/ dessication capsule presence aids bacteria to better evade host defense cells capsule functions as a passive defense barrier capsule is coded by chromosomal DNA in majority of bacteria none of the above is a false statement
- There are many antibiotics that target the bacterial cell wall, but there are few antibiotics that target the cell membrane. Why might this be so?Which of the following mechanisms of action of antibiotics has the fewest side effects? protein synthesis cell wall synthesis DNA replication synthesis of essential metabolites enzymatic activityAntibodies made against a bacterium's would bloick attachment to host cell surface receptors (best answer) fimbriae O flagella O ribosomes endospores
- Why might clinical medicine have an interest in understanding bacterial cell division at the molecular level? Explain why a hyperthermophile would probably not be a human pathogen. Describe four factors that may have an influence on the effectiveness of an antimicrobial treatment. Explain why 70% or 80% alcohol is more effective than 100% alcohol in controlling microorganisms.Consider the given bacterial growth curve (X axis is time, Y axis is log number of viable cells). At which time point would you expect the greatest sensitivity (ability to be killed) by a drug like penicillin? 100 120 NO 20 time (minutes) O 100 minutes O 45 minutes O 15 minutes O 140 minutes Log a of viablk cellsAminoglycosides inhibit protein synthesis in bacteria. These class of antibiotics are considered to be ___ . none of these choices effective only against gram-negative bacteria effective only against gram-positive bacteria broad-spectrum antibiotics